Incrustação em poço produtor de petróleo e gás natural: um estudo de caso

Water and gas is a common by - product of the oil production process. Production may be compromised by the precipitation of inorganic salts in both the reservoir and producing well, through scale formation. This precipitation is likely the cause of the formation damage. High temperatures and h igh pressures (HTHP) may favor the precipitation of insoluble salts. The most common types of scale in oil fields are calcium carbonate and calcium sulphate, strontium and barium sulphate. New types of scale formation have attracted special attention such as zinc sulphide and lead. This precipitation may occur in the pores of reservoir rocks, in the production string and in equipment, causing obstructions and consequent production losses. In this study, the influence of well depth on incrustation compositio n was investigated to design removal treatments and assess the behavior of these deposits along the string, through the analysis of pressure and temperature. Scale residues were recovered from the inside of the production string of an oil and gas well duri ng the string removal operation. A total of 10 samples from different depths (15.4 m to 4061.5 m) were obtained. Initially a dissolution test was conducted in weak acid, similar to that used in removal operations with this type of scale formation. Majority composition was defined and confirmed by dissolution tests using X - Ray Fluorescence Spectroscopy (XRF), X - Ray Diffraction (XRD) and Scanning Electron Microscope (SEM) techniques. Residues with distinct characteristics were observed in different proportion s, showing a tendency toward increased and/or decreased mass with depth. In the samples closest to the surface, typical sandstone residues were found, with calcium (45% Ca) as the metal of highest concentration. The obtained results indicate correlations o f the scale types studied with the depth and, consequently, with the thermodynamic conditions of pressure and temperature.

Heidegger e a técnica moderna

The general objective of this research is to clarify and discuss the original contribution of Martin Heidegger's philosophical reflection on the essence of modern technique. For this purpose, it was structured the interpretative course of this dissertation in two essential moments. At first, we present Heidegger's interpretation of the essence of the modern age which, in turn, will be recognized from the metaphysical foundation that establishes the essence of modern science: the subjectivity that represents, calculates, manages and produces the real. We will see which, in this context, modern science was still thought close to the modern technology, what will change considerably from the writings of the post-war, in which Heidegger thinks modern science from a much broader and essential process in that the essence of the technique has already been unfolding. Thus, in a second moment, we will analyze how, for Heidegger, the modern metaphysics of subjectivity reached its completion at the time of modern art from the principle of control and planning of entities in general (Gestell), revealing the nontechnical sense of the technique (beyond the anthropological, humanistic and instrumental view) as well as the threatening character of modern technique in its conversion project of the entity from the reserve fund (Bestand).

Universalização do acesso à saúde e regulação dos planos privados de assistência à saúde: a atuação regulatória da ANS como instrumento de harmonia contratual e viabilização do papel suplementar da iniciativa privada na efetivação do direito social à saúde

While essential to human nature, health and life have been protected since ancient times by various areas of knowledge, particularly by the Law, given its dynamics within the regulation of social interactions. In Brazil, health has been granted major importance by the Federal Constitution of 1988, which, disrupting the dictatorial authoritarianism, inaugurating a Social State and focusing on the values of freedom and human dignity, raises health to the condition of a social right, marked predominantly by an obligational bias directed, primarily, to the State, through the enforcement of public policies. Although, given the limitation of the State action to the reserve for contingencies, it turns clear that an universalizing access to public health is impossible, seen that the high cost of medical provisions hinders the State to meet all the health needs of the rightholders. As a result of the inefficiency of the State, the effort of the Constituent Assembly of 1988 in creating a hybrid health system becomes nuclear, which, marked by the possibility of exploration of healthcare by the private initiative, assigns to the private enterprise a key role in supplementing the public health system, especially through the offer of health insurance plans. At this point, however, it becomes clear that health provisions rendered by the private agents are not unlimited, which involves discussions about services and procedures that should be excluded from the contractual coverage, for purposes of sectoral balance, situation which draws the indispensability of deliberations between Fundamental Rights on one hand, related to the protection of health and life, and contractual principles on the other hand, connected to the primacy of private autonomy. At this point, the importance of the regulation undertaken by the ANS, Brazilian National Health Agency, appears primordial, which, by means of its seized broad functions, considerable autonomy and technical discretion, has conditions to implement an effective control towards the harmonization of the regulatory triangle, the stability and development of the supplementary health system and, consequently, towards the universalization of the right to health, within constitutional contours. According to this, the present essay, resorting to a broad legislative, doctrinal and jurisprudential study, concludes that economic regulation over the private healthcare sector, when legitimately undertaken, provides progress and stability to the intervening segment and, besides, turns healthcare universalization feasible, in a way that it can not be replaced efficiently by any other State function.

Vivências do pai/ acompanhante no processo da hospitalização do filho

The presence of the man with the hospitalized child is still insignificant and the relationships established in hospitals culminate in several situations that can to influence his experience. The study aimed to analyze the experiences of the parent / caregiver during the hospitalization of their child. In intention to develop the research, it was conducted an exploratory and descriptive qualitative research approach, developed with 11 fathers who accompanied sick childen at the Paediatric Hospital in metropolitan area of Natal, Rio Grande do Norte, Brazil. As inclusion criteria men should be aged 18 years; have favorable emotional conditions to answer the questions are be accompanying his child aged between one to five years old in clinical or surgical. Data collection occurred in March and April 2014, using an interview script. This step prior to the approval of the Health Department of state of Rio Grande do Norte, approved by Universidade Federal do Rio Grande do Norte Committee on Ethics in Research by Certificate of Presentation and Ethics Consideration No. 22821513.1.0000.5537. The data treatment occurred following the content analysis method in thematic modality proposed by Bardin. According to statements the following categories emerged: "The presence of the father in the hospitalization of a child" and "Responsibilities and parental attitudes the hospitalization of a child”, which were analyzed and discussed based on the literature on the family in the hospitalization of the child and considerations about the care of the child. It was founded that the respondents the experienced institutionalization son were inserted in a context of active participation of tasks and sharing responsibilities. Thus it was considered in the study the need of enforcing rights of the father as a family entity in practice of them child care instead of social and gender issues that are still strongly rooted in contemporary society. Given this, it is necessary that the nursing staff consider the various situations faced by man during infant hospitalization with the first fruits of this approach to the care of the son process minimizing the sequelae stemming from being away from the family nucleus

Questionamentos acerca de valores axiológicos no turismo: uma abordagem fenomenológica hermenêutica

The study presents the possibility of interpretation of axiological values of tourism as a practice conceived on a human being or Dasein as being-in-the-world of tourism. The value, as an object of Axiology, was considered the predictor of the human being conduct in the phenomenon reflecting this same value in tourism. The aim was to comprehend and interpret through the way of being of Dasein in tourism, which axiological values are chosen to the practice of tourism and the intentional feelings directed to these values. A phenomenological hermeneutics research with exploratory characteristics was accomplished in order to survey the values. Ten episodic interviews were conducted from the hermeneutic situation - constituted by fore-having, fore-sight and fore-conception of each Dasein interviewed, by adopting a sympathetic conduct and sympathy of Max Scheler and the use of emotional intuition to capture the intentional feelings, interpreted afterwards by the analysis of a Martin Heidegger's phenomenology in Being and Time. The results showed that, even without categorisation, the totality of the living experiences, the way of being of positive values outnumber the negatives ones in the existence of each Dasein, leading them to the Learning, which are comprising: experiences to provide self-knowledge, historical-cultural values, and memory as part of the learning experiences, hospitality as a way of openness and socio-cultural exchange, solidarity and peace. Intentional feelings directed at the values for the choice for practicing tourism were: love, happiness, pleasure, respect and trust. Four evidences were found concerning the use of sentimental perspective and intentional feeling of Scheler and regarding the logic of the heart of Pascal used by this author. The sociocultural interrelationships and exchanges form the basis for developing tourism as phenomenon. Therefore the character being-with or Mitsein is prevalent in tourism activities. Despite the learning was the purpose of the experiences, the ultimate goal was the improvement and personal enrichment of Dasein´s humanity development. The study also showed the hermeneutic phenomenological seeing opens the access of the living experiences of values, without making arbitrarily judgment and achieve "to the thing themselves", which, by the overlapping of categories, dispositions and intentional feelings, form the evaluative experiences and are possible to access through the fundamental ontology of Heidegger. The study contributes to broaden the vision concerning to the totality of tourism and the practitioners Dasein of it. As possibilities for deepening studies, was pointed out: the total person of Scheler; the care or Sorge as a form of love in Heidegger; happiness and pleasure in the practice of tourism and human flourishing or eudaimonia.

Caracterização da captura incidental de tartarugas marinhas pela pesca de espinhel pelágico no Nordeste do Brasil

The marine turtles biological characteristics and the impact they have been suffering in consequence of human activities have caused in the last decades the decrease of populations to unsustainable levels. All four of the species described in this paper are registered as endangered in a list by IUCN: Caretta caretta, Lepidochelys olivacea, Chelonia mydas, Dermochelys coriacea. The main causes of such impact include several fishing activities, mostly the surface longline. This paper discusses the monitoring of two foreigner longline fleet along the North East Brazilian coast between October of 2004 and September of 2005. Both operated in the West South Atlantic, one using the Chinese technique and the other the American. The American method s target species is the swordfish (Xiphias gladius), and it is characterized by using squid as bait, J 9/0 offset 5º hook, light sticks and night soaking. It also operates in shallower waters than the Chinese method. The source of information about the efforts and the catches came from onboard observers and were used to calculate the catching rate of turtles over 1000 hooks (CPUE). The American equipment caught more turtles (CPUE = 0,059; N= 103), mainly D. coriacea, while the Chinese longline caught mainly the L. olivacea and presented a CPUE= 0,018 (N= 89). The hooks were most frequently found attached to the mouth of C. caretta, C. mydas, and L. olivacea. The D. coriacea were most frequently caught by hooks externally attached to different parts of their body. There was no significant difference between the hook type catching and most turtles were still alive when released. The results suggest a greater potential of turtle catching by the American method. Besides the statistic tests have showed less interaction between the Chinese equipment and marine turtles, the catches of this fishing technique could have been underestimated due to miscommunication between the onboard observer and the vessel s crew plus the retrieve of the longline during night time

Projeto, construção e análise de um prototipo vibracional em escala de bancada aplicável ao tratamento de água de produção de petróleo bruto, mediante inovadora operação híbrida de adsorção e auto-flotação

A self-flotator vibrational prototype electromechanical drive for treatment of oil and water emulsion or like emulsion is presented and evaluated. Oil production and refining to obtain derivatives is carried out under arrangements technically referred to as on-shore and off-shore, ie, on the continent and in the sea. In Brazil 80 % of the petroleum production is taken at sea and area of deployment and it cost scale are worrisome. It is associated, oily water production on a large scale, carrier 95% of the potential pollutant of activity whose final destination is the environment medium, terrestrial or maritime. Although diversified set of techniques and water treatment systems are in use or research, we propose an innovative system that operates in a sustainable way without chemical additives, for the good of the ecosystem. Labyrinth adsor-bent is used in metal spirals, and laboratory scale flow. Equipment and process patents are claimed. Treatments were performed at different flow rates and bands often monitored with control systems, some built, other bought for this purpose. Measurements of the levels of oil and grease (OGC) of efluents treaty remained within the range of legal framework under test conditions. Adsorbents were weighed before and after treatment for obtaining oil impregna-tion, the performance goal of vibratory action and treatment as a whole. Treatment technolo-gies in course are referenced, to compare performance, qualitatively and quantitatively. The vibration energy consumption is faced with and without conventional flotation and self-flotation. There are good prospects for the proposed, especially in reducing the residence time, by capillary action system. The impregnation dimensionless parameter was created and confronted with consecrated dimensionless parameters, on the vibrational version, such as Weber number and Froude number in quadratic form, referred to as vibrational criticality. Re-sults suggest limits to the vibration intensity